I was tired of dealing with it, so I readjusted and doubled all of them. I backed off the nut and with both hands slowly tightened until the lash was just off from the rocker so that I couldn't lift the rod any longer, then I turned an additional 1/2 to 3/4 turn. Some only let me go 1/2 before bottoming out. I had plenty of thread to put the other nut on. I was concerned that I wouldn't be able to hold the bottom nut while tightening because of the shoulders on the lifters. But I didn't need to. The bottom nut didn't move when I tightened the top nut. Hope you get it figured out.
And by the way, great job on that truck, your gallery is inspirational.